Week 3 - 2D meshing for sheet metal

AIM: To study the given component (HOOD) and to perfrom the midsurfacing and Meshing using ANSA Preprocessing Software.

PROCEDURE : 

• First I exmanined the given sheet metal component. And then assigned the material to it from material section.
• After assigning the material I checked the ENT and PID model and perform the geometry check. The errors are then fixed with autofix operation.
• After the errors got fixed I deleted the uneccessory hot points. And then perfromed Fine operation to see how the actual model looks like.
• After Fine operaton I checked the each property.
• And then measured the length of component using measuerment operation. Randomly I measure.
• Now for midsurfacing part. 
• I selected each component separately for midsurfacing there are total 5 component including two same component.
• I selected the Faces> midsurface> skin to perform midsurfacing operation on each component.
• After completing the midsurface I assigned NEW PID to the every midsurface with thickness to it.
• So for Inner and Outer hood I assigned the thickness of 0.75 and for latch and hinge 1.2 mm.
• Now for meshing I done the check opertion first to see by switching single cons off. There were no errors on the component.
• Then selected the quality criteria according to requirement.
• Now I selected the each component seperately to perform meshing.
• I gave same length to each component that is 5 from Perimeter> length section.
• Then perform the best mesh generation operation for meshing.
• The off elements are eliminated by using different operations like Reconstrcuct, smooth,improve.
• After completing the mesh operation I checked for the OFF element and resolved them using SHELL MESH and ELEMENTS section.
• The triangles near to the holes and edges are eleminated by using Swap,join, spits in ELEMENT section.

 THE SCREENSHOTS ARE SHARED BELOW: 

1. Before midsurfacing                                     

2. After midsurfacing

3. Setting PID and THICKNESS

4.Before FINE and orientation 

5.After FINE and orientation

6.Setting Perimeters>Length (5mm) for meshing operation.

7. Modifying using Project Cut for better meshing.

8. Meshing Using Mesh Gen> Best.

9.Reconstructing the mesh to for better mesh flow. Shell Mesh> Reconstruct/smooth.

10.After Reconstruction.

11. Deleting triangles near to the holes or edge. Element>Join.

12. After performing Joining operation.

13. Final Result

LEARNING OUTCOMES: 

1. Fluency in handeling ANSA software.
2. Got the knowledge about how to give midsurface to component using midsurface operation.
3. Got used to SET PID 
4. Got used to the Micros> cut and Project cut section in order to solve minimum length error and other error.
5. Learnt different type of mesh resoving operation like Reconstruct , smooth, improve opertion and also Split, Swap, join operation. And also deleting and addind new element in meshing.

CONCLUSION: The midsurafacing and 2D meshing operation is performed successfully. All the quality criteria are checked.The meshing has no OFF elements and mininum number of trias. All